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Testing DECS-150

• CompF: Compensated Frequency

Deviation

• ErrIn: AVR Error Signal

• FcrErr

• FcrOut

• G/M Hz: Generator/Motor Frequency {Hz}

• I1: Positive Sequence Current {pu}

• I2: Negative Sequence Current {pu}

• Ia: Phase A Current {pu}

• Iaux: Cross Current Input {pu}

• Iavg: Ave Line Current{pu}

• Ib: Phase B Current {pu}

• Ic: Phase C Current {pu}

• Ifd: Field Current {pu}

• kVA: Total Power {pu}

• kvar: Reactive Power {pu}

• kW: Real Power {pu}

• MechP: Filtered Mechanical Power

• Network Load Share

• NullBalance: Null Balance Level

• OelOutput: OEL Controller Output

• PF: Power Factor

• Post: Post-Limit Output {pu}

• POut: Final PSS Output {pu}

• Prelim: Pre-Limit Output {pu}

• PsskW: PSS Electric Power {pu}

• Ptest: Time Response Signal {pu}

• SclOutput: SCL Controller Output

• Synth: Synthsized Speed {pu}

• TermF: Terminal Frequency Deviation

• Test: Frequency Response Signal {pu}

• Tflt1: Torsional Filter #1 {pu}

• TrnOp: Internal State {pu}

• UelOutput: UEL Controller Output

• V1: Positive Sequence Voltage {pu}

• V2: Negative Sequence Voltage {pu}

• Vab: PhA-PhB L-L Voltage {pu}

• Var/PfErr

• Var/PfOut

• Vaux: Aux Voltage Input {pu}

• Vavg: Ave L-L Voltage {pu}

• Vbc: PhB-PhC L-L Voltage {pu}

• Vbus: Bus Voltage {pu}

• Vca: PhC-PhA L-L Voltage {pu}

• Vfd: Field Voltage {pu}

• Vtmag: PSS Term Voltage

• WashP: Washed Out Power

• WashW: Washed Out Speed {pu}

• x10: Mechanical Power LP #3

• x11: Mechanical Power LP #4

• x15: Lead-Lag #1 {pu}

• x16: Lead-Lag #2 {pu}

• x17: Lead-Lag #3 {pu}

• x2: Speed HP #1

• x29: Torsional Filter #2 {pu}

• x31: Lead-Lag #4 {pu}

• x5: Power HP #1 {pu}

• x7: Mechanical Power {pu}

• x8: Mechanical Power LP #1

• x9: Mechanical Power LP #2

Frequency Response

Read-only frequency response fields indicate the magnitude response, phase response, and test signal

frequency. The magnitude response and phase response corresponds to the test signal previously

applied. The test frequency value reflects the frequency of the test signal currently being applied.

Caution

Exercise caution when performing frequency response testing on a

generator connected to the grid. Frequencies that are close to the

resonant frequency of the machine or neighboring machines are to be

avoided. Frequencies above 3 Hz may correspond to the lowest shaft

torsional frequencies of a generator. A torsional profile for the machine

should be obtained from the manufacturer and consulted before

conducting any frequency response tests.

Time Response

Tests should be performed at various load levels to confirm that the input signals are calculated or

measured correctly. Since the PSS function uses compensated terminal frequency in place of speed, the

derived mechanical power signal should be examined carefully to ensure that it does not contain any

components at the electromechanical oscillation frequencies. If such components are present, it indicates

that the frequency compensation is less than ideal, or that the machine inertia value is incorrect.

Brand	Basler
Model	DECS-150
Category	Control Systems
Language	English

Basler DECS-150 User Manual

Table of Contents

Questions and Answers:

Basler DECS-150 Specifications

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